body{
    width:100%;
    background: #d5d5d5;
    box-sizing:border-box;
    padding: 0 20px 20px 20px;
    font-family: 微软雅黑,"Helvetica Neue",Helvetica,Arial,sans-serif;
}

nav{
    padding: 0 20px;
    box-sizing:border-box;
    width:100%;
    height:60px;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    background: #d5d5d5;
}

nav a{
  text-decoration: none;  
  color:#000;
}

nav ul li{
    cursor: pointer;
}

nav ul:first-child{
    height:60px;
    overflow: hidden;
    border-bottom:1px solid #ccc;
}

nav ul:first-child li{
    height:100%;
    float: right;
    width:100px;
    text-align: center;
    line-height:60px;
    border-left:1px solid #ccc;
    position: relative;
}

nav ul:first-child li a{
    display: block;
    width: 100%;
    height: 100%;
}

nav ul:first-child li>div{
    position: absolute;
    width:100%;
    height: 100%;
    top:100%;
    left:0;
    background:#000912;
    z-index: -1;
}

nav ul:first-child li:nth-child(1){
    width:106px;
    float: left;
    border-left:none;
}

nav div.header_hide{
    position: absolute;
    top:60px;
    width:325px;
    height:auto;
    right:20px;
    /*z-index: 10000;*/
    background: #d5d5d5;
    z-index: -1;
    box-sizing:border-box;
    display: none;
    border-left:1px solid #aaa;
    border-right:1px solid #aaa;
}


nav div.header_hide>p{
    text-align: right;
    padding:15px 20px;
    color:#000;
    font-weight: bold;
    border-top:1px solid #aaa;
    cursor: pointer;
}

nav div.header_hide>p:last-child{
    text-align: center;
    cursor:auto;
}

nav div.header_hide>p img{
    display: inline-block;
    width:22px;
    height: 22px;
    margin:0 20px;
    cursor: pointer;
}

nav ul:first-child li:nth-child(1) span{
    display: block;
    width:100%;
    height:43px;
    background:url(../images/logo.png);
    background-size:106px 86px;
    background-position:left top;
    margin:8.5px 0;
    transition:all 0.5s ease 0s;
}

nav ul:first-child li:nth-child(1):hover span{
    background-position:left bottom;
}

.nav_hover{
    color:#fff;
}

nav ul:first-child li:nth-child(2),nav ul:first-child li:nth-child(3){
   width:60px;
}

nav ul:first-child li:nth-child(3) span{
    display: block;
    width:44px;
    height:27px;
    background:url(../images/fd.png) 0 -50px no-repeat;
    /*background-position:0 -25px;*/
    margin:16.5px auto;
}

nav ul:first-child li:nth-child(2) span.line{
    /*position: absolute;*/
    width:30px;
    height:2px;
    background: black;
    margin:10px auto 0 auto;
    display: block;
}

nav ul:first-child li:nth-child(2) span.line:first-child{
    margin-top:17px;
}



nav ul:first-child li:nth-child(3):hover span,nav ul:first-child li:nth-child(2):hover span{
    background-position:0 -25px;
}

nav ul:last-child{
    width: 100%;
    overflow: hidden;
    display: none;
}

nav ul:last-child li{
    width:33.33%;
    float: left;
}

nav ul:last-child li a{
    text-decoration: none;
    text-align: center;
    color:#000;
    font-size:14px;
    display: block;
    width:100%;
    line-height: 42px;
}



@media (max-width:768px){
    .swiper-container{
        margin-top:102px;
    }

    nav div.header_hide{
        top:102px;
    }

    nav{
        height: 102px;
    }

    nav ul:last-child{
        display: block;
    }

    nav ul:first-child li:nth-child(4),nav ul:first-child li:nth-child(5),nav ul:first-child li:nth-child(6){
            display: none;
    }
}

@media (max-width:540px){
    nav div.header_hide{
        width:100%;
        right:0;
        padding:0 20px;
    }

    nav div.header_hide p{
        text-align: center;
    }
}

